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Relatives of two young women who were seriously injured in an acid attack in Zanzibar have spoken of their frustration over delays in finding the perpetrator.

Londoners Kirstie Trup and Katie Gee, both 18, are recovering after being targeted by two men on a moped during a volunteering holiday on August 7.

Kirstie Trup and Katie Gee, both 18, from north London

Doug Morris, the partner of Miss Gee's mother, told the BBC's Radio 4 Today programme: "If the Foreign and Commonwealth Office are as committed to helping to bring these people to justice on behalf of two British citizens, then you would expect them to move hell and high water to do that."

Miss Trup's father Marc said the families are "not getting any progress whatsoever" and that he suspected the Tanzanian authorities "just hope this will go away".

"I don't blame the country, I don't blame the religion. I blame the person. He needs to be brought to justice," he added.

The teenager discharged from hospital after suffering an acid attack in Zanzibar has been named as 18-year-old Kirstie Trup.

Kirstie Trup has been discharged from hospital. Credit: Facebook

A spokeswoman for the hospital said she left while her friend remains, being treated for burns where she was previously said to be in a "stable" condition.

The spokeswoman said: "We can confirm that Kirstie Trup was discharged from the hospital last night. Katie Gee remains in hospital. No details on either of the patients' treatment will be released at this time."

One of the teenagers injured in an acid attack in Zanzibar has been discharged by Chelsea and Westminster Hospital.

In a statement the hospital said: "We can confirm that one patient was discharged from the hospital last night. The second patient remains in hospital. No details on either of the patients’ treatment will be released at this time.

"This approach is in line with the families’ wishes and we continue to ask that the media respect their privacy at this time."

Kirstie Trup and Katie Gee, both 18, from north London, were enjoying the last week of a trip as volunteer teachers.

Katie Gee and Kirstie Trup, both 18, from north London, were enjoying the last week of a trip as volunteer teachers to the predominantly Muslim island when a corrosive substance was thrown at them.

A woman from Wimbledon - who was the victim of an acid attack 30 years ago - has offered hope and support to the two teenage girls recently targeted in Zanzibar. Lynn Pereira had to undergo more than 140 operations, after a gallon of acid was thown in her face.

She's been describing how the attack on Londoners Kirstie Trup and Katie Gee has brought back painful memories but that she now feels that she is a 'victor'. Ruth Banks has been speaking to her.